If 2g of water is at 1C and a copper block at 3C is added to it, and the finall tempertature of mixture is 7 C , what is the mass of the copper?

The APA rule for numbers is that you should begin a sentence with a word even if the number is greater than nine, and the word "percent" should also be used.

Explanation:

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)